6533b857fe1ef96bd12b3af9
RESEARCH PRODUCT
INTEGRAL/RXTE Observations of Cygnus X-1
Guy G. PooleyKatja PottschmidtV. SchönfelderPeter KretschmarRüdiger StaubertA. A. ZdziarskiJörn WilmsT. GleissnerS. Martínez-núñezS. Martínez-núñezMichael A. NowakJerome RodriguezT. J. L. CourvoisierMaria ChernyakovaVolker Beckmannsubject
Black hole physics ; Individual stars ; Cyg X-1 ; Gamma rays ; X-rays observations ; BinariesAstrophysics::High Energy Astrophysical PhenomenaPhase (waves)FOS: Physical sciencesFlux02 engineering and technologyAstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysicsCyg X-101 natural sciencesOmegaSpectral lineIonizationIndividual stars0103 physical sciencesOptical depth (astrophysics)0202 electrical engineering electronic engineering information engineeringCalibration010303 astronomy & astrophysicsOptical depthPhysics010308 nuclear & particles physicsGamma raysBinariesAstrophysics (astro-ph)X-rays observationsGamma rayAstronomyAstronomy and Astrophysics020206 networking & telecommunicationsBlack hole physics:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]CoronaSpace and Planetary ScienceReflection (physics)020201 artificial intelligence & image processingUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]description
We present first results from contemporaneous observations of Cygnus X-1 with INTEGRAL and RXTE, made during INTEGRAL's performance verification phase in 2002 November and December. Consistent with earlier results, the 3-250 keV data are well described by Comptonization spectra from a Compton corona with a temperature of kT~50-90 keV and an optical depth of tau~1.0-1.3 plus reflection from a cold or mildly ionized slab with a covering factor of Omega/2pi~0.2-0.3. A soft excess below 10 keV, interpreted as emission from the accretion disk, is seen to decrease during the 1.5 months spanned by our observations. Our results indicate a remarkable consistency among the independently calibrated detectors, with the remaining issues being mainly related to the flux calibration of INTEGRAL.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-09-06 | AIP Conference Proceedings |